How often do you go back and change a review?

Occasionally I'll review a beer then revisit the review, and decide that what I originally scored was different than what I thought now. For example I'm drinking a Kalamazoo stout which for whatever reason I wasn't impressed with before but right now I'm very much enjoying. Do you guys go back and change your reviews much?

Actually- my tastes haven't changed much over my 6 years on BA- I have gone back an elaborated on some of my very early reviews-but generally unless there are consistency issues with particular brews and vintages I don't change my numeric scores.

I did change a quite few reviews when the BA system converted from "drinkability" to "overall" score as there is a huge difference with those terms. I probably still have some off reviews because of that though.

I've changed "Place" reviews a couple of times, usually stemming from a particularly low marking I gave the place due to customer service issues. I have no problem changing my review if a person from the business reaches out to me, is apologetic, states they've done restructuring, etc. For example, I gave Williamsburg Alewerks a pretty bad review on here (even though I dig their beer overall) and a person contacted me a couple of days and apologetically asked if I'd be interested in a re-visit now that lots of changes had transpire since the time of my review. I totally admire this proactive stance and definitely plan on taking them up on the offer.

I've been contacted in this manner about 3-4 times now on here and try to be cordial, inviting, and fair every time.